[PATCH 3/6] pci: add PCI quirk cmdmem fixup for Intel DSA device

[Dave Jiang]

Since there is no standard way that defines a PCI device that receives
descriptors or commands with synchronous write operations, add quirk to set
cmdmem for the Intel accelerator device that supports it.

Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
 drivers/pci/quirks.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 29f473ebf20f..ba0572b9b9c8 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5461,3 +5461,14 @@ static void quirk_reset_lenovo_thinkpad_p50_nvgpu(struct pci_dev *pdev)
 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1,
 			      PCI_CLASS_DISPLAY_VGA, 8,
 			      quirk_reset_lenovo_thinkpad_p50_nvgpu);
+
+/*
+ * Until the PCI Sig defines a standard capaiblity check that indicates a
+ * device has cmdmem with synchronous write capability, we'll add a quirk
+ * for device that supports it.
+ */
+static void device_cmdmem_fixup(struct pci_dev *pdev)
+{
+	pdev->cmdmem = 1;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x0b25, device_cmdmem_fixup);